A Light Spectrum Is Formed on a Screen Using a Diffraction

question 73

Multiple Choice

A light spectrum is formed on a screen using a diffraction grating.The entire apparatus (source, grating and screen) is now immersed in a liquid of index 1.33.As a result, the pattern on the screen:

• A)remains the same
• B)spreads out
• C)crowds together
• D)becomes reversed, with the previously blue end becoming red
• E)disappears because the index isn't an integer